General Restrictions on Parameters that must be Lists (ANSI and GNU Common Lisp Document)

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#### 14.1.2.3 General Restrictions on Parameters that must be Lists

Except as explicitly specified otherwise, any standardized function that takes a parameter that is required to be a list should be prepared to signal an error of type type-error if the value received is a dotted list.

Except as explicitly specified otherwise, for any standardized function that takes a parameter that is required to be a list, the consequences are undefined if that list is circular.